It said so on the box! :smilewink:
For me, there is a strong connection between immersion and SA. Using TIR supplies more than enough immersion for me to go without the peripheral screens. Still, the eye candy is nice!
To the OP - no regrets at all, as I need the three screens (five, actually - with a networked Thinkpad and additional 23" screen) for work. But you really just can't go wrong with the one main screen, along with TIR and a nice HOTAS. As you can see, pretty much everyone here will agree with that.